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You are here: manpages





GETSOCKNAME

Section: Linux Programmer's Manual (2)
Updated: 2008-12-03
Index Return to Main Contents
 

NAME

getsockname - get socket name  

SYNOPSIS

#include <sys/socket.h>

int getsockname(int sockfd, struct sockaddr *addr, socklen_t *addrlen);
 

DESCRIPTION

getsockname() returns the current address to which the socket sockfd is bound, in the buffer pointed to by addr. The addrlen argument should be initialized to indicate the amount of space (in bytes) pointed to by addr. On return it contains the actual size of the socket address.

The returned address is truncated if the buffer provided is too small; in this case, addrlen will return a value greater than was supplied to the call.  

RETURN VALUE

On success, zero is returned. On error, -1 is returned, and errno is set appropriately.  

ERRORS

EBADF
The argument sockfd is not a valid descriptor.
EFAULT
The addr argument points to memory not in a valid part of the process address space.
EINVAL
addrlen is invalid (e.g., is negative).
ENOBUFS
Insufficient resources were available in the system to perform the operation.
ENOTSOCK
The argument sockfd is a file, not a socket.
 

CONFORMING TO

SVr4, 4.4BSD (the getsockname() function call appeared in 4.2BSD), POSIX.1-2001.  

NOTES

The third argument of getsockname() is in reality an int * (and this is what 4.x BSD and libc4 and libc5 have). Some POSIX confusion resulted in the present socklen_t, also used by glibc. See also accept(2).  

SEE ALSO

bind(2), socket(2), getifaddrs(3), ip(7), socket(7), unix(7)  

COLOPHON

This page is part of release 3.81 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
SEE ALSO
COLOPHON


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